linux-kernel - Re: [PATCH v3 04/13] rust: add pin-init API core

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Message-ID: <87sfdl2kon.fsf@metaspace.dk>
Date:   Fri, 31 Mar 2023 14:00:31 +0200
From:   Andreas Hindborg <nmi@...aspace.dk>
To:     y86-dev@...tonmail.com
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Alice Ryhl <alice@...l.io>, rust-for-linux@...r.kernel.org,
        linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Andreas Hindborg <a.hindborg@...sung.com>
Subject: Re: [PATCH v3 04/13] rust: add pin-init API core


y86-dev@...tonmail.com writes:

> From: Benno Lossin <y86-dev@...tonmail.com>
>
> This API is used to facilitate safe pinned initialization of structs. It
> replaces cumbersome `unsafe` manual initialization with elegant safe macro
> invocations.
>
> Due to the size of this change it has been split into six commits:
> 1. This commit introducing the basic public interface: traits and
>    functions to represent and create initializers.
> 2. Adds the `#[pin_data]`, `pin_init!`, `try_pin_init!`, `init!` and
>    `try_init!` macros along with their internal types.
> 3. Adds the `InPlaceInit` trait that allows using an initializer to create
>    an object inside of a `Box<T>` and other smart pointers.
> 4. Adds the `PinnedDrop` trait and adds macro support for it in
>    the `#[pin_data]` macro.
> 5. Adds the `stack_pin_init!` macro allowing to pin-initialize a struct on
>    the stack.
> 6. Adds the `Zeroable` trait and `init::zeroed` function to initialize
>    types that have `0x00` in all bytes as a valid bit pattern.
>
> --

<snip>

> Co-developed-by: Gary Guo <gary@...yguo.net>
> Signed-off-by: Gary Guo <gary@...yguo.net>
> Signed-off-by: Benno Lossin <y86-dev@...tonmail.com>
> ---

Reviewed-by: Andreas Hindborg <a.hindborg@...sung.com>